import java.util.Scanner;
public class Task01 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		float sum = 0;
		
		try {
			for (int i=0; i<3;i++){
				sum += sc.nextFloat();
			}
		} finally {
			System.out.println(sum);
			sc.close();
			}
	}

}






